Transmission, Conduction and Generation of Nerve Impulse

The following condition is observed when a neuron is not conducting an impulse and axonal membrane is :

• More permeable to K⁺

• More permeable to Na⁺

• More permeable to Ca⁺⁺

• None of the above

Which of the following ions is actively pumped out of the neuron to maintain the resting membrane potential?

• Calcium

• Chloride

• Sodium

• Potassium

What is the role of neurotransmitters at the synapse?

• Insulate the axon

• Facilitate electrical conduction

• Transmit the signals between neurons

• Generate resting potential

Which part of the nervous system is responsible for integrating sensory information and coordinating voluntary and involuntary responses?

• Peripheral Nervous System

• Central Nervous System

• Somatic Nervous System

• Autonomic Nervous System

During an action potential, the rapid influx of which ion causes depolarisation of the neuron?

• Calcium

• Chloride

• Sodium

• Potassium

Which type of conduction allows action potentials to jump between nodes of Ranvier in myelinated axons?

• Continuous conduction

• Saltatory conduction

• Passive conduction

• Active conduction

Which of the following is a characteristic of the resting membrane potential of a neuron?

• The inside of the cell is more positive than the outside

• Sodium ions are more concentrated inside the cell

• The inside of the cell is more negative than the outside

• Potassium ions are more concentrated outside the cell

Action potential refers to

• a very positive charge inside and outside of the neuron

• a very negative charge inside and outside of the neuron

• a change of charge between the inside and outside of the neuron

• action outside the membrane that cause the neuron's membrane to close all its pores

Which of the following gate opens during repolarization

• Na⁺ gates and Na⁺/K⁺ pump

• K⁺ gates and Na⁺/K⁺ pump

• Na ⁺ and K⁺ gates

• Na⁺ gates only

What is the most important factor required to maintain membrane potential

• A reactive sodium pore

• The sodium potassium pump

• The release of neurotransmitters at the synaptic terminal

• the the movement of water from high to low concentrations over the neuron's membrane